Iron 56 is the lightest
Protium (Hydrogen-1) is the lightest and by far the most common isotope of hydrogen.
The lightest artificial isotope is hydrogen-3, also called "tritium". The lightest element that has no naturally occurring isotopes is technetium.
The lightest element without a stable isotope is Technetium (atomic number 43). All of its isotopes are radioactive, with none occurring naturally on Earth.
Protium is the name of a common hydrogen isotope. This isotope has a single proton and does not have any neutrons.
Hydrogen is the lightest element. The isotope protium is the lightest kind of hydrogen atom.
The lightest element of all should have the lightest atomic mass. It is hydrogen-1 isotope. This atom has only one proton and no neutrons.
The number of neutrons in an iron atom can vary depending on the isotope of iron. For the most common isotope, iron-56, there are 30 neutrons.
The lightest "element" that can undergo radioactive decay is the isotope hydrogen-3, which undergoes beta decay. The lightest element with no radioactively stable isotopes is technetium, and its isotopes have different modes of decay.
The lightest metal that is still magnetic is iron. Iron is a ferromagnetic material, meaning it can be magnetized when placed in a magnetic field. It is also relatively lightweight compared to other magnetic metals like cobalt and nickel.
26 protons, 26 electrons in iron. Fe-56, the most stable isotope of iron, has 30 neutrons
There is no isotope of Uranium 206 - Uranium 217 is the lightest.
In the most abundant isotope of iron, there are 26 protons and 26 neutrons.